message-edit: Trigger mouseleave on row when hiding message_edit div.
message-edit: Trigger mouseleave on row when hiding message_edit div.

For the pencil icon to appear, message_unhover has to be called before
message_hover (both in ui_init.js). This happens when the mouseleave
event is triggered on a row. But, when clicking the save button and
the edit box is hidden, the mouseleave event is not triggered and
hence message_unhover not called.

Fix this with a manual mouseleave event.

Fixes: #4287.

brainwane/zulip,brainwane/zulip,kou/zulip,punchagan/zulip,timabbott/zulip,tommyip/zulip,synicalsyntax/zulip,zulip/zulip,brockwhittaker/zulip,shubhamdhama/zulip,showell/zulip,hackerkid/zulip,rishig/zulip,jackrzhang/zulip,brainwane/zulip,jrowan/zulip,kou/zulip,jrowan/zulip,eeshangarg/zulip,andersk/zulip,Galexrt/zulip,verma-varsha/zulip,jackrzhang/zulip,synicalsyntax/zulip,dhcrzf/zulip,punchagan/zulip,dhcrzf/zulip,verma-varsha/zulip,verma-varsha/zulip,jrowan/zulip,brainwane/zulip,andersk/zulip,timabbott/zulip,rht/zulip,tommyip/zulip,eeshangarg/zulip,showell/zulip,amanharitsh123/zulip,rht/zulip,verma-varsha/zulip,eeshangarg/zulip,vabs22/zulip,punchagan/zulip,amanharitsh123/zulip,punchagan/zulip,showell/zulip,vaidap/zulip,synicalsyntax/zulip,shubhamdhama/zulip,timabbott/zulip,rht/zulip,punchagan/zulip,rishig/zulip,brockwhittaker/zulip,jrowan/zulip,jackrzhang/zulip,kou/zulip,andersk/zulip,jrowan/zulip,zulip/zulip,shubhamdhama/zulip,brainwane/zulip,kou/zulip,shubhamdhama/zulip,tommyip/zulip,amanharitsh123/zulip,rishig/zulip,showell/zulip,dhcrzf/zulip,tommyip/zulip,mahim97/zulip,synicalsyntax/zulip,vabs22/zulip,Galexrt/zulip,rishig/zulip,mahim97/zulip,shubhamdhama/zulip,mahim97/zulip,hackerkid/zulip,timabbott/zulip,hackerkid/zulip,synicalsyntax/zulip,rht/zulip,andersk/zulip,brainwane/zulip,mahim97/zulip,zulip/zulip,shubhamdhama/zulip,zulip/zulip,verma-varsha/zulip,zulip/zulip,rht/zulip,kou/zulip,tommyip/zulip,punchagan/zulip,eeshangarg/zulip,eeshangarg/zulip,vaidap/zulip,vaidap/zulip,vaidap/zulip,amanharitsh123/zulip,dhcrzf/zulip,kou/zulip,zulip/zulip,showell/zulip,vaidap/zulip,dhcrzf/zulip,eeshangarg/zulip,verma-varsha/zulip,andersk/zulip,vabs22/zulip,hackerkid/zulip,shubhamdhama/zulip,tommyip/zulip,mahim97/zulip,amanharitsh123/zulip,tommyip/zulip,jackrzhang/zulip,rishig/zulip,Galexrt/zulip,Galexrt/zulip,rht/zulip,punchagan/zulip,vabs22/zulip,showell/zulip,jrowan/zulip,mahim97/zulip,eeshangarg/zulip,hackerkid/zulip,brockwhittaker/zulip,Galexrt/zulip,dhcrzf/zulip,amanharitsh123/zulip,synicalsyntax/zulip,rht/zulip,vabs22/zulip,vabs22/zulip,showell/zulip,timabbott/zulip,rishig/zulip,hackerkid/zulip,kou/zulip,Galexrt/zulip,brockwhittaker/zulip,rishig/zulip,brainwane/zulip,jackrzhang/zulip,Galexrt/zulip,hackerkid/zulip,timabbott/zulip,brockwhittaker/zulip,timabbott/zulip,synicalsyntax/zulip,andersk/zulip,andersk/zulip,jackrzhang/zulip,brockwhittaker/zulip,jackrzhang/zulip,zulip/zulip,dhcrzf/zulip,vaidap/zulip